silverstripe-framework/forms/FormField.php

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<?php
/**
* Represents a field in a form.
* A FieldSet contains a number of FormField objects which make up the whole of a form.
* In addition to single fields, FormField objects can be "composite", for example, the {@link TabSet}
* field. Composite fields let us define complex forms without having to resort to custom HTML.
*/
class FormField extends ViewableData {
protected $form;
protected $name, $title, $value ,$message, $messageType, $extraClass;
/**
* @var $description string Adds a "title"-attribute to the markup.
* TODO Implement in all subclasses
*/
protected $description;
/**
* @var $extraClasses array Extra CSS-classes for the formfield-container
*/
protected $extraClasses;
public $dontEscape;
/**
* @var $rightTitle string Used in SmallFieldHolder() to force a right-aligned label.
*/
protected $rightTitle;
/**
* @var $leftTitle string Used in SmallFieldHolder() to force a left-aligned label with correct spacing.
* Please use $title for FormFields rendered with DefaultFieldHolder.
*/
protected $leftTitle;
/**
* Create a new field.
* @param name The internal field name, passed to forms.
* @param title The field label.
* @param value The value of the field.
* @param form Reference to the container form
* @param maxLength The Maximum length of the attribute
*/
function __construct($name, $title = null, $value = "", $form = null, $rightTitle = null) {
$this->name = $name;
$this->title = ($title === null) ? $name : $title;
if(isset($value)) $this->value = $value;
if($form) $this->setForm($form);
parent::__construct();
}
/**
* Returns the HTML ID of the field - used in the template by label tags.
* The ID is generated as FormName_FieldName. All Field functions should ensure
* that this ID is included in the field.
*/
function id() {
$name = ereg_replace('(^-)|(-$)','',ereg_replace('[^A-Za-z0-9_-]+','-',$this->name));
if($this->form) return $this->form->FormName() . '_' . $name;
else return $name;
}
/**
* Returns the field name - used by templates.
*/
function Name() {
return $this->name;
}
/**
* Returns the field message, used by form validation
*/
function Message(){
return $this->message;
}
/**
* Returns the field message type, used by form validation
*/
function MessageType(){
return $this->messageType;
}
/**
* Returns the field value - used by templates.
*/
function Value() {
return $this->value;
}
/**
* Method to save this form field into the given data object.
* By default, makes use of $this->dataValue()
*/
function saveInto(DataObject $record) {
if($this->name) {
$record->setCastedField($this->name, $this->dataValue());
}
}
/**
* Returns the field value suitable for insertion into the data object
*/
function dataValue() {
return $this->value;
}
/**
* Returns the field label - used by templates.
*/
function Title() {
return $this->title;
}
function setTitle($val) {
$this->title = $val;
}
function RightTitle() {
return $this->rightTitle;
}
function setRightTitle($val) {
$this->rightTitle = $val;
}
function LeftTitle() {
return $this->leftTitle;
}
function setLeftTitle($val) {
$this->leftTitle = $val;
}
/**
* Compiles all CSS-classes. Optionally includes a "nolabel"-class
* if no title was set on the formfield.
*
* @return String CSS-classnames
*/
function extraClass() {
$output = "";
if(is_array($this->extraClasses)) {
$output = " " . implode($this->extraClasses, " ");
}
if(!$this->Title()) $output .= " nolabel";
return $output;
}
/**
* Add a CSS-class to the formfield-container.
*
* @param $class String
*/
function addExtraClass($class) {
$this->extraClasses[$class] = $class;
}
/**
* Remove a CSS-class from the formfield-container.
*
* @param $class String
*/
function removeExtraClass($class) {
if(array_key_exists($class, $this->extraClasses)) unset($this->extraClasses[$class]);
}
/**
* Returns a version of a title suitable for insertion into an HTML attribute
*/
function attrTitle() {
return Convert::raw2att($this->title);
}
/**
* Returns a version of a title suitable for insertion into an HTML attribute
*/
function attrValue() {
return Convert::raw2att($this->value);
}
/**
* Set the field value.
* Returns $this.
*/
function setValue($value) { $this->value = $value; return $this; }
/**
* Set the field name
*/
function setName($name) { $this->name = $name; }
/**
* Set the container form.
* This is called whenever you create a new form and put fields inside it, so that you don't
* have to worry about linking the two.
*/
function setForm($form) {
$this->form = $form;
}
/**
* Sets the error message to be displayed on the form field
* Set by php validation of the form
*/
function setError($message,$messageType){
$this->message = $message;
$this->messageType = $messageType;
}
/**
* Returns the form field - used by templates.
* Although FieldHolder is generally what is inserted into templates, all of the field holder
* templates make use of $Field. It's expected that FieldHolder will give you the "complete"
* representation of the field on the form, whereas Field will give you the core editing widget,
* such as an input tag.
*
* Our base FormField class just returns a span containing the value. This should be overridden!
*/
function Field() {
if($this->value) $val = $this->dontEscape ? ($this->reserveNL?Convert::raw2xml($this->value):$this->value) : Convert::raw2xml($this->value);
else $val = '<i>(none)</i>';
$valforInput = $this->value ? Convert::raw2att($val) : "";
return "<span class=\"readonly\" id=\"" . $this->id() . "\">$val</span>\n<input type=\"hidden\" name=\"".$this->name."\" value=\"".$valforInput."\" />";
}
/**
* Returns a "Field Holder" for this field - used by templates.
* Forms are constructed from by concatenating a number of these field holders. The default
* field holder is a label and form field inside a paragraph tag.
*
* Composite fields can override FieldHolder to create whatever visual effects you like. It's
* a good idea to put the actual HTML for field holders into templates. The default field holder
* is the DefaultFieldHolder template. This lets you override the HTML for specific sites, if it's
* necessary.
*/
function FieldHolder() {
$Title = $this->XML_val('Title');
$Message = $this->XML_val('Message');
$MessageType = $this->XML_val('MessageType');
$RightTitle = $this->XML_val('RightTitle');
$Type = $this->XML_val('Type');
$extraClass = $this->XML_val('extraClass');
$Name = $this->XML_val('Name');
$Field = $this->XML_val('Field');
$titleBlock = (!empty($Title)) ? "<label class=\"left\" for=\"{$this->id()}\">$Title</label>" : "";
$messageBlock = (!empty($Message)) ? "<span class=\"message $MessageType\">$Message</span>" : "";
$rightTitleBlock = (!empty($RightTitle)) ? "<label class=\"right\" for=\"{$this->id()}\">$RightTitle</label>" : "";
return <<<HTML
<div id="$Name" class="field $Type $extraClass">$titleBlock<span class="middleColumn">$Field</span>$rightTitleBlock$messageBlock</div>
HTML;
}
/**
* Returns a restricted field holder used within things like FieldGroups.
*/
function SmallFieldHolder() {
$result = '';
// set label
if($title = $this->RightTitle()){
$result .= "<label class=\"right\" for=\"" . $this->id() . "\">{$title}</label>\n";
} elseif($title = $this->LeftTitle()) {
$result .= "<label class=\"left\" for=\"" . $this->id() . "\">{$title}</label>\n";
} elseif($title = $this->Title()) {
$result .= "<label for=\"" . $this->id() . "\">{$title}</label>\n";
}
$result .= $this->Field();
return $result;
}
/**
* Returns true if this field is a composite field.
* To create composite field types, you should subclass {@link CompositeField}.
*/
function isComposite() { return false; }
/**
* Returns true if this field has its own data.
* Some fields, such as titles and composite fields, don't actually have any data. It doesn't
* make sense for data-focused methods to look at them. By overloading hasData() to return false,
* you can prevent any data-focused methods from looking at it.
*
* @see FieldSet::collateDataFields()
*/
function hasData() { return true; }
function isReadonly() {
return !in_array($this->class, array("ReadonlyField","FormField","LookupField"));
}
/**
* Returns a readonly version of this field
*/
function performReadonlyTransformation() {
$field = new ReadonlyField($this->name, $this->title, $this->value);
$field->setForm($this->form);
return $field;
}
/**
* Return a disabled version of this field
*/
function performDisabledTransformation() {
$disabledClassName = $this->class . '_Disabled';
if( ClassInfo::exists( $disabledClassName ) )
return new $disabledClassName( $this->name, $this->title, $this->value );
elseif($this->hasMethod('setDisabled')){
$this->setDisabled(true);
return $this;
}else{
return $this->performReadonlyTransformation();
}
}
function transform(FormTransformation $trans) {
return $trans->transform($this);
}
/**
* Returns the field type - used by templates.
* The field type is the class name with the word Field dropped off the end, all lowercase.
* It's handy for assigning HTML classes.
*/
function Type() {return strtolower(ereg_replace('Field$','',$this->class)); }
/**
* Construct and return HTML tag
*/
function createTag($tag, $attributes, $content = null) {
$preparedAttributes = '';
foreach($attributes as $k => $v) {
$preparedAttributes .= " $k=\"" . Convert::raw2att($v) . "\"";
}
if($content) return "<$tag$preparedAttributes>$content</$tag>";
else return "<$tag$preparedAttributes />";
}
/**
* Validation Functions for each field type by default
* formfield doesnt have a validation function
*/
function jsValidation() {}
function validate(){return true;}
/**
* Describe this field, provide help text for it.
* The function returns this so it can be used like this:
* $action = FormAction::create('submit', 'Submit')->describe("Send your changes to be approved")
*/
function describe($description) {
$this->description = $description;
return $this;
}
function debug() {
return "$this->class ($this->name: $this->title : <font style='color:red;'>$this->message</font>) = $this->value";
}
/**
* This function is used by the template processor. If you refer to a field as a $ variable, it
* will return the $Field value.
*/
function forTemplate() {
return $this->Field();
}
function Required() {
if($this->form && ($validator = $this->form->Validator)) {
return $validator->fieldIsRequired($this->name);
}
}
// ###################
// DEPRECATED
// ###################
/**
* DEPRECATED Please use addExtraClass
*/
function setExtraClass($extraClass){
$this->extraClasses[] = $extraClass;
}
function _getExtraClass(){
return $this->extraClass;
}
}
?>